Hose clamp



Pafented Main 21, 1939 PATENT OFFICE HOSE CLAMP Louis]. Rauch und lhlllp Brooklyn, N. Y.

Rauch,

Appllcation'Apnll 14, 1938, Serlal N0. 201,858

'I 'hls invention relates to hose clamps.

An object 01 the lnventlon is to provlde.an improved elamp construction compring two separate bands which are adjustable for use an hose or similar objects 01 difierent sizes by the interengagement of an element on one part with cooperating elements an the other, am! which maybe clamped tlghtly arourid a. hose ofapprop'rlate size in any of 1ts adjustment's by draw- Ing together free ends of its respective parts. A special feature of our improved constructlon lies in 1ts abllity to withstand severe tightening without bending of breaking under th'e stresses thus lmp osedupon the adjusting und tightening elements, even when the clamp ls made o1 llght, inexpensive metal stock.

An illustrative embodim'ent o! the invention 1s shown in the accompanying drawing, in whlch Flgure 1 is a. cross sectlon thrbugh the 1mproved hose clamb as tightened around a hose in use. 4

Flgure 2 shows a hase end assembled on the end of a pipe and iastenecl inplaoe by mea.ns 02 the improved hose clamp.

Figures 3 und 4, respectively, are perspective views of difi'erent parts 02 the cla.mp and Flgure 5 1s a side view of the assembiy shown in Flgure 2.

'I'he illustrated hose clamp Somprises two princlpal cooperating parts, A und B, the genera.l construction of which .is indlcated quite clearly in Figures 3 and 4, respectlvely. As shown in Flgure 3, pa.rt A comprises a band 01 sheet metal hav1ng a shank portion M) and an npertured lag 20 a1; one end extending a.t an angle with respect to the band. The shank portion W is formed with a series cf spaced apertures fl2 providing a serles n! spaced ledges II for cooperation wlth an element of paart B.

Part B of he ciamp, as shown in Flgure 4, also consists 013 a unitary band which ls mao'le irom sheet metal of the same type and sauge as paart A. I1; is much langer than pa'ri; A am. is formed to encircle a. hose completely with an end portion 28 extending in overlapping rela.tlon to part '0f the band when the clamp is assembled in use. One end of B 1s Iormed as a. Ing 30 substantially identical with' Ing 20 01 part A,

which will be described more particularly below. A portion 32 of the band adJacent the other end ls reduced in width as a.t 33 und 34 am! thls refluced portion termlnates in an outwardly am! backwardly directed hook 36 01 a. size adapted to extend through the apertures' I2 of part A a.nd to ansage any one of the ledges II. Between back 36 und Ing 39, a.nd nearer the latter, an elonf gated slot is cut out 012 the band, as indicated at 38, this slot being ot a. wldth suiflcient to permit tree movement o! the aforesa.idreduced end portion therein, with the hook extendinc 4 Olaims. (01. 24-19) through the siot to the periphery 01 the band when part B ls curved. in conditlon for use, substantlally a.s illustxated in Figure 4.

Thz: assembly of parts A a.nd B in the use 01 the clamp 1s illu'trated in Figures 1, 2 and 5, which show a. hose e'nd III fastened on a. pipe end 12 by means O1 the assembled parts. Each of the parts 1s normally curved approximately as shown, to fit the contour o! the hose. Part B 1s first opened and looped around the hose, en-

circllng the same between the hooked end. ands lot 38 wlth hook 36 extendlng outwardly through the slot. Part A 1s then lnterlocked wlth part B by engaging ohe 01 1ts ledges I4 in hook 36 s0 that lt extends around a slde of the hose opposite the portion 28 015 part B, with Ing '20 in registering but spaced relation to 1ug 30. It 1s obvious that any of several ledges II may be chosen for interengagement with hook 36, depending upon the desired spaclng of lugs 20 and '30 and that the clamp 1s adapted for use w1th equal facillty on objects of dlfierent diameters. Upon arrangement of the tWo clamp pleces around the hose, a. holt 44 passing thro1igh the apertures of the lugs and a, nut; 46 may be used to draw the lugs 2 and 3B together and thus clamp the hose end flrmly an pipe end 42. It will be understood, cf course, that the clamp parts may be assembled loosels und then sllpped over the end of the hose or other object wher'ever circumstances permit.

Severe limltations are imposed on the practical construction of s. device of this type which must' be overcome in order to provide the most ad" vantageous structure. In the flrst place, the cost of the clamp must be kept 10W, which requires the use of inexpensive materials am! 02 few und simple n1anufacturing operations. In the second place, the clamp should possess more than adequate clampirig strength and resistance to bencling or breakage under the stress encountered in use, yet these parts must be flexible t:o permit easy adjustment and ea.sy assembly in clamplng positlon. The lmproved hose clamp construction provided by this invention is especlally suited to meet these exacting requirements. It will be noted that the assembly o! part B around a hose. a.s well a the engagement Qf hook 36 with dlflerent members of the series o1 ledges -05 ductile metal stock having a thlckn egsfpxf example, in the order o! 5": of an 1nch. Economy o1 manutacture requires that the entlre clamp be ma.de o! thls same material. In the seo1' tli clamp. however, streng Iorces are exerted on the h k 18 tendinsjto bend lt bo. ck lnto 11ne with 2 the band, and the angularly disposed lugs 2 0 and 30 similarly are subject to bendlng tension which must be resisted in order tor the clamp to perform satisifactorily.

To meet these problems; we deform the metal adjacent the bends ofhook 38 and lugs 20 and 30 so th.t its rigldity and resistance to bending and breaking are greatly increased. Tims the metal adiacent the bend oi hoo k 36 is formed with a central longitudinal rib 50 which is pressed from the plane of the band and has the same eflect on its strength es would beimpanted by a considerable increase in thickness or by aflxing a reenforcing element of strenger material.

'I'he metal adjacent the bend of each of lugs 20 and 30 also is formed with a central longitudinal rib, indicated at 52, which is pressed out of the plane of the strip and preferably extends around and to points on both sides of the bend. In additlon longitudinal side flanges 54 and 56, extend- Ing at an angle tothe metal of the r(espective Parts, are provided on eachlug and aroun d the bends thereof by deforming side margins of the metal outwardly into a plane extending at an angle, preferably at approximately 90, with respect to the parts. These features together impart great rigidity to the otherwise pliable metal in the zone of the lugs, and causes each lug to remain in flxed angular relation to the body of -lts respective part so that streng pulling action bending or breaking oft the lugs when the tension on the clamp reaches its maxixnum point.

As indieatedin Flgure 2, the side flanges 54 and 58 on eax:h lug conveniently may be spaced apart so a's to form a closely fitting enclosure Ior the nut 48. Inthis way the nut of the tighteningelements may be placed in either lug and held securely against rotation while the holt M is turned to clamp the device tightly in place.

We understand that devlatlons from the illustrated c0nstruction ma.y be made without departing from the essentials oi. the invention which should be accorded a scope commensurate with the requirernents of the claims.

We claim:

1. A clamp ior fastening hose or the like comprising two cooperating bands each formed of bendable sheet material and each having an integral tightening lug on one end extending at an angle-to the respective band, one o1 said bands being of a length insu.fllcient to encircle the hose and having a series of longitudinally spaced integral ledges extending from a point adjaeent its other end over a substantial part of its length, the other o! said bands being o1 a length to enc.ircle a hose completely and overlap itseli' when in position thereon and having its other end reduced in width and turned backwardly to form an integral hook, sa.id other band havlng an elongated slot intermediate its ends in such position and of such length as to permit said hoc]: to be passed therethtough and engaged with a ledge on said one band when the portion of said other band between said slot and hook encircles. hose of diflerent slzes. and means integral with.

prising two oooperating bands each formed of' bendable sheet metal 01 sim ilar ganze and auch having an integral tightening lug on one end extending at an angle to the rspeotive band, one of said bands being o! a ler1gth insufllcient to encircle the hose'and having at least one aperture adjacent its 'other end.providlng an integral ledge facing toward its lug, the other. oi sa.id bands being of a length to encircle the hose completely and ovl'ap'itself when in position thereon and having its bisher endreduced in width and turned backwardly to form' an integral hook, said other band having a. longitudinal slot intermediate its ends in such position and of such length Es to permit said hook to be passed therethrough, engaged with said ledge and mov'ed relative to the slot when the portion between said slot andhook encircles a hose, and means integral with said bands extending longitudinally and disposed substantially centrally with respect to the bends of said lugs and hook respectively, rendering the same rigid and re'sistant. to bendlng under strains encountered in cl'amping the parts inplace.

3. In a. multiple-part hose clamp adapted to encircle a hose twice when clamped thereon in use, a clamp part comprising an elongatad band made of easily benclable sheet metal, one end o! said band consisting of an integral, apertured tightening lug extendingat an angle to its body. the other end being reduced in width and terminating in a backwardly-bent hook, said band being of a. length greater than the circumference of the hose and having a longitudinal slot intermediate its ends but nearer said lug, and means integral with said band adlacent the bend o! said hook rendering the same rigid and resistant to bending or breaking under strains encountered in clamping the part on a hose, said means comprising a longitudinal rib presed out 01 the plane of the band around said bend and substantially centrally withrespect to said band.

4. A clamp for fastening hose or the lil:e comprislng two cooperatingbands each formed of -bendable sheet metal of similar gauge and each and overlap itselt when in position thereon and having its other end reduced in width and trned backwardly to form an integral hook, said other band having a longitudinal slot intermediate its ends in such position and of such length as to permit sa.id hook to be passed therethrough, en-- gaged with said ledge and moved relative to the slot when the portion between said slot and hoch encircles a hose, the metal of sa.id other band ad- Jaoent said hook and 015 both bands adjacent said lugs having centrally disposed longitudinal rlbs pressed out of its normal plane and extending around and. to both sides of the bands cf said hook and lugs, respectively, each of said lugs having spaced longitudinal flanges exteriding at an angle to the same side 018 each lug and around the bend thereof, said lugs havihg registering apertures therein to receive a tightenlng holt, and said flanges being spaoed apart to enclose and prevent rotation of a nut ior said holt.-

LOUIS J. RAUCH:

PHILIP RAUCH. 

